Good morning,(or afternoon, or evening)

We have a large diameter thread rolling tool (140mm) in a 40mm sidelock capto C6. It's 250mm long (from spindle nose) and 7.6Kg.

It looks and sounds terrible when being changed (drooping in the arm, and loud thud as it clamps in).

It was originally described as an SL tool, then we tried H, but I couldn't see (or hear) any difference to the tool change process.

I feel it should have BOTH descriptors.

Okuma have told me I can change a sys para to slow the arm speed down, which I will do now, but I don't want every tool change slowed down.

Has anyone had experience with large, heavy tool changes?

Any advice greatly appreciated.

Dave.